KOREAN PHONE MAKER Samsung's flagship Galaxy S4 smartphone is being investigated by the BBC's Watchdog programme over its lack of available storage and will be featured on the show next week.

Watchdog is a TV show where UK viewers write in to complain about things like dodgy builders and the small amount of filling in their sandwiches, but it looks like Samsung's Galaxy S4 has also caught the eye of the BBC show.

We didn't realise that people got so excited about the show, but Watchdog has released a teaser clip ahead of next week's show where the programme's stonefaced host Anne Robinson asks, "Samsung, it claims its brand new Galaxy phone has an extra large memory, but what did it forget to mention?"

This seems to suggest that the investigation will look into the amount, or lack thereof, of available storage on the Galaxy S4, with the 16GB model offering just 9.5GB of user storage. However, Samsung has argued that, unlike some smartphones, the Galaxy S4 comes with a microSD card slot allowing users to add up to 64GB of additional storage.

It's also likely that the show will look into the 32GB and 64GB models that are yet to appear on UK shelves, despite Samsung's promises that all three versions will be available.

The Samsung Galaxy S4 will feature on the BBC Watchdog show on BBC1 at 8PM BST on Wednesday, 15 May.

Samsung said it would not be commenting, but the BBC has confirmed that it is investigating the Galaxy S4 at present, and has said that it is holding talks with Samsung about the issue. It has not revealed which specific issue with the Galaxy S4 it is investigating.